Actually football usually makes more revenue than all of the other sports combined, and provides for funding of those sports. So cutting football usually isn't an option.

But seriously, how much does a wrestling program even cost? It's not like it takes a hell of a lot of equipment and a big expensive stadium. What do you even have to pay for? The coach's salary I guess.

It's not really econimic. They have to have the same proportion of men and women sports plus there are other weird NCAA rules . NAIA is constantly adding Men's wrestling while NCAA is constantly dropping them so it more than econimics.